DSpace Collection:https://repository.kopri.re.kr/handle/201206/51562026-04-28T18:44:49Z2026-04-28T18:44:49ZRadiative Properties of King Sejong Station in West Antarctica with the Radiative Transfer Model: Climate Change using Radiative Convective Equilibrium ModelLee, Kyu-TaeJee, Joonbum윤영준이원학Lee, Bang Yonghttps://repository.kopri.re.kr/handle/201206/67182022-03-24T07:12:50Z2006-01-01T00:00:00ZTitle: Radiative Properties of King Sejong Station in West Antarctica with the Radiative Transfer Model: Climate Change using Radiative Convective Equilibrium Model
Authors: Lee, Kyu-Tae; Jee, Joonbum; 윤영준; 이원학; Lee, Bang Yong
Abstract: 연직 공기 기둥에 대한 복사 및 대류 과정이 포함된 일차원 복사-대류 평형 모형을 구축하였고, 이 모형을 이용하여 남극 세종기지에서 복사-대류 평형 온도를 계산 하고 분석하였다. 이 모형의 반응도에서 지표면 알베도와 태양 천정각의 코사인 및 이산화탄소 증가는 지표면에서의 복사-대류 평형 온도를 감소시켰다. 그리고 구름 광학두께가 비교적 큰 하층운은 지표면 온도를 감소시키나, 구름 광학두께가 작은 상층운은 온실효과 때문에 지표면 온도를 증가시켰다. 남극 세종기지의 44년(1958～2001)의 기간에 대하여 계산된 지표면에서의 복사-대류 평형 온도의 연변화는 0.012 ℃/년이었다. 마찬가지로 13년 동안(1989～2001)의 자료에 대한 복사-평형 온도 변화는 0.01 ℃/월이었으며, 동일한 기간의 관측 자료 분석 결과로는 0.005 ℃/월의 변화를 나타내었다.2006-01-01T00:00:00ZSurface Flux Measurements at King Sejong Station in West Antarctica: Ⅱ. Turbulent exchanges of sensible heat and latent heat in the austral summer of 2002-2003Choi, TaejinLee, Bang YongKim, Seong-JoongHong, Sung-MinLee, Hee-Choonhttps://repository.kopri.re.kr/handle/201206/66322022-03-24T07:11:24Z2005-01-01T00:00:00ZTitle: Surface Flux Measurements at King Sejong Station in West Antarctica: Ⅱ. Turbulent exchanges of sensible heat and latent heat in the austral summer of 2002-2003
Authors: Choi, Taejin; Lee, Bang Yong; Kim, Seong-Joong; Hong, Sung-Min; Lee, Hee-Choon
Abstract: Turbulent fluxes of sensible heat and latent heat were analyzed at King Sejong station in the austral summer of 2002 (December) and 2003 (January and February). Monthly mean air temperatures of January and February (2.2oC) were similar to those averaged over 1988 to 2001. Precipitation wasless in January and greater in February than those averaged over last 14 years. In December of 2002 and January, there was precipitation primarily when easterly wind blew usually. The frequency of snowfallwas equal to or larger than that of rainfall. In the mean while, precipitation primarily in forms of rainfall occurred with westerly wind in February. In addition, while for easterly wind, temperature and humidity was low, temperature and humidity were high in case of westerly wind. Based on flux footprint,measured flux mainly came from within 300 m with maximum of 40 m upwind, indicating the insignificant role of the sea around the study site. Half-hourly downward short wave radiation amounted up to∼ 1000 Wm-2 and net radiation ranged from -50 to 600 Wm-2. Half-hourly sensible heat flux waspositive at daytime with maximum of ∼ 400 Wm-2, except the 27th and 28th in February of 2003 when it was negative all day despite of positive net radiation at short daytime. Latent heat flux was positive with maximum of ∼ 130 Wm-2. Depending on wind direction, the partitioning of net radiationinto the sum of sensible heat flux and latent heat flux was larger than 0.8, indicating the strong source of the land surface for the atmospheric heating. The daytime averaged Bowen ratio (=sensible heat flux /latent heat flux) was significantly greater than 1, indicating that sensible heat flux was the main source to heat the atmosphere over the site.2005-01-01T00:00:00ZFlux Footprint Climatology and Data Quality at Dasan Station in the ArcticLee, Bang YongChoi, Taejin윤영준Lee, Hee-Choonhttps://repository.kopri.re.kr/handle/201206/66352022-03-24T07:13:58Z2005-01-01T00:00:00ZTitle: Flux Footprint Climatology and Data Quality at Dasan Station in the Arctic
Authors: Lee, Bang Yong; Choi, Taejin; 윤영준; Lee, Hee-Choon
Abstract: Turbulent fluxes of heat, water vapor, and CO2 have been measured since August, 2003 at Dasan Station(78o 55' N, 11o50'E) in the Arctic. These data can allow us to better understand the interactions between the Polar ecosystems and the atmosphere together with those at King Sejong Station in the Antarctic. Due to the buildings and measurement platforms around the flux tower, it is required to evaluate how they influence measured flux data. By using one-year turbulence statistics data and footprint model, flux footprint climatology was analyzed together with data availability. The upwind distance of source area ranged from 150 to 300 m, where the buildings and measurement platforms existed. However, flow distortion due to them may be not a major factor to reduce the data availability significantly. Based on, the dominant wind direction of SW and footprint climatology, the location of flux tower is considered suitable for flux measurement.2005-01-01T00:00:00Z